Effects of overcharging the battery of a laptop - By: Jessica Thomson

The laptops are foldable portable computers which look like a book. The first laptop is believed to have been designed by William Moggridge in 1979. Later a better designed laptop was promoted in 1983 by Manny Fernandez. Historians consider this laptop to be the first functional laptop computer. Basically three types of batteries were used in these laptops. The Lithium-ion batteries, nickel-cadmium batteries, and the nickel-metal Hydride batteries are the three types of batteries used ever since the invention of the laptops. The nickel-cadmium batteries are the oldest types of batteries used in the laptop computers. After the nickel-cadmium batteries, the nickel-metal hydride batteries were invented. These offered about 30 percent more performance than the previous batteries. The Li-ion battery is the latest technology used in the laptop.
Of these three types, the Li-ion battery is mainly used in the new today's laptops. Overcharging a battery occurs when the charger keeps the battery at a higher temperature (warmer than the body temperature) during the normal working condition.
The Li-ion batteries are managed differently than the older batteries made from Ni-Cad in the previous laptops. The Li-ion batteries used in the laptops usually have a controller chip already built inside to prevent the overcharging of the batteries. If the voltage while charging the battery is above 4.30 V, the battery cell will cause lithium metal plating on the anode in the cell. Also the material of the cathode acts as an oxidizing agent and loses its stability and thus releases oxygen. If the batteries are overcharged they can also cause explosions. Overcharging the laptop destroys the battery potentially rather than affecting the lifespan of the battery. The lithium battery should never be allowed to get hot while charging. If this happens, then it is evident that either the performance of the battery has decreased or the charger is not working properly.
Sometimes due to the constant laptop charging static electricity is created which causes problems during shutting down of the laptop. Also due to such problems it may also affect the laptop's motherboard. The laptop will not shut down nor will it go to the standby mode. The laptop screen would just hang up on the 'Windows is shutting down' screen or the screen would just black out during a restart which during extreme situations may need the laptop screen repaired. Sometimes the laptop software's also get affected and their working becomes slow.
Thus the tips to charge the laptop and increase the life span of the laptop's battery should be followed properly.

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